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| author | Nick Lewycky <nicholas@mxc.ca> | 2008-11-03 02:43:49 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2008-11-03 02:43:49 +0000 |
| commit | 8f4d5eb9e543d22df61a98c4115ed81887213333 (patch) | |
| tree | 04066da191d4667976b4a33ffb275ab223c9d3a2 /test | |
| parent | ae61ca02061cc500cb9f093a492899658249a245 (diff) | |
| download | llvm-8f4d5eb9e543d22df61a98c4115ed81887213333.tar.gz llvm-8f4d5eb9e543d22df61a98c4115ed81887213333.tar.bz2 llvm-8f4d5eb9e543d22df61a98c4115ed81887213333.tar.xz | |
Don't crash analyzing certain quadratics (addrec of {X,+,Y,+,1}).
We're still waiting on code that actually analyzes them properly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58592 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/ScalarEvolution/2008-11-02-QuadraticCrash.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/2008-11-02-QuadraticCrash.ll b/test/Analysis/ScalarEvolution/2008-11-02-QuadraticCrash.ll new file mode 100644 index 0000000000..c6cb87fca1 --- /dev/null +++ b/test/Analysis/ScalarEvolution/2008-11-02-QuadraticCrash.ll @@ -0,0 +1,21 @@ +; RUN: llvm-as < %s | opt -analyze -scalar-evolution +; PR1827 + +declare void @use(i32) + +define void @foo() { +entry: + br label %loop_1 + +loop_1: ; preds = %loop_1, %entry + %a = phi i32 [ 2, %entry ], [ %b, %loop_1 ] ; <i32> [#uses=2] + %c = phi i32 [ 5, %entry ], [ %d, %loop_1 ] ; <i32> [#uses=1] + %b = add i32 %a, 1 ; <i32> [#uses=1] + %d = add i32 %c, %a ; <i32> [#uses=3] + %A = icmp ult i32 %d, 50 ; <i1> [#uses=1] + br i1 %A, label %loop_1, label %endloop + +endloop: ; preds = %loop_1 + call void @use(i32 %d) + ret void +} |